编者按:近些年,我国畜牧业快速发展,满足了全社会不断增长的畜产品需求,同时也产生了大量的养殖废弃物,畜禽粪污问题日益突出。随着国家对环保的重视,畜禽养殖环保问题日益成为行业关注的热点和焦点、并成为一个社会性问题,一系列政策和法令相继出台、“三区”划分不 Editor’s note: In recent years, the rapid development of animal husbandry in our country has met the growing demand of livestock products in the whole society. At the same time, a large amount of farming waste has also been produced. The problem of livestock and poultry manure has become increasingly prominent. As the state attaches great importance to environmental protection, the environmental protection of livestock and poultry is increasingly becoming a hot topic and focus of the industry and has become a social issue. A series of policies and decrees have been promulgated one after another, and the division of “three districts”